Process for preparing a toner resin, toner resin prepared...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 236/10 (2006.01) C08F 2/38 (2006.01) G03G 9/087 (2006.01) G03G 9/10 (2006.01)

Patent

CA 2076179

A toner resin suitable for being used in toner compositions or developer compositions for electrostatic imaging is prepared by polymerization of styrene and butadiene in the presence of a mixture of n-dodecyl mercaptan and t-dodecyl mercaptan. The toner resin has defined weight average and number average molecular weights and a defined polydispersity that provide an improved toner resin that can be attained without blending different copolymers while using conventional apparatus. Additionally, the toner resin can exhibit a suitable melt index and glass transition temperature.

Une résine toner utile pour compositions toner ou compositions de développement en visualisation électrostatique est préparée par polymérisation du styrène et du butadiène en présence d'un mélange de n-dodécylmercaptan et de t-dodécylmercaptan. La résine toner a une masse moyenne, une masse moléculaire moyenne et un taux de polydispersion bien définis, permettant d'obtenir une résine toner améliorée sans avoir à mélanger différents copolymères à l'aide d'appareils classiques. De plus, la résine toner peut avoir un indice de fusion et une température de transition vitreuse appropriés.

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